FX Reference Rates
GET https://x402.professorsausages.com/fx-rates/on/:date
Listed in Coinbase x402 Bazaar
Full rate snapshot on a historical fixing date back to 1999 — month-end revaluation staple; weekend dates substitute the prior fixing, flagged
Other endpoints from x402.professorsausages.com
The same service's other paid functions that Hagglyai tracks, each with its own price. Functions outside Hagglyai's categories are not listed.
| Endpoint | Category | Price per call |
|---|---|---|
| GET /13f-holdings/top | Stocks & forex | $0.02 |
| GET /company/:idOrTicker/financials | People & company enrichment | $0.005 |
| GET /fx-rates/latest | Stocks & forex | $0.02 |
| GET /fx-rates/rate/:base/:quote | Stocks & forex | $0.002 |
| GET /insider-trades/company/:idOrTicker | Stocks & forex | $0.01 |
| GET /insider-trades/company/:idOrTicker/summary | Stocks & forex | $0.02 |
| GET /insider-trades/insider/:cik | Stocks & forex | $0.01 |
| GET /insider-trades/recent | Stocks & forex | $0.02 |
| GET /news/ai | News | $0.02 |
| GET /news/headlines | News | $0.02 |
| GET /news/search | News | $0.03 |
| GET /news/timeline | News | $0.03 |
| GET /prices/spot/:pair | Crypto prices & market data | $0.002 |
| GET /sec-10k/filing/:cik | Stocks & forex | $0.01 |
| GET /sec-10q/filing/:cik | Stocks & forex | $0.01 |
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET "https://x402.professorsausages.com/fx-rates/on/:date"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-14 19:00 | No valid 402 | 400 | 580 ms | not listed |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves